How to measure leakage current with a multimeter, methods for measuring leakage current with a multimeter. Using the continuity setting of the multimeter, measure between the ground and the circuit being tested. If the meter shows a resistance value, it indicates that there is no insulation. However, in practice, to measure leakage current, a megohmmeter … Read more
A multimeter, also known as a multimeter, three-in-one meter, or multifunction meter, is a versatile measuring instrument that can measure direct current (DC) and alternating current (AC) voltage, resistance, and audio levels. Some models can also measure AC current, capacitance, inductance, and certain parameters of semiconductors (such as β). AC Voltage Measurement: As shown in … Read more
1. Self-Diagnosis of LIN BusWhen performing self-diagnosis on the LIN data bus system, the address code of the LIN master control module must be used. The self-diagnostic data is transmitted from the LIN slave control module to the LIN master control module via the LIN bus. All self-diagnostic functions can be completed on the LIN … Read more
1.The multimeter is divided into analog and digital multimeters. As shown in the figure below, the left image is an analog multimeter, and the right image is a digital multimeter. 2.The function of the multimeter is to measure AC voltage, DC voltage, DC current, resistance, and other multifunctional measurements. 3.Pre-use checks for the multimeter. (1) … Read more
The reason a multimeter can measure current, voltage, and resistance lies in its use of a sensitive galvanometer. When a small current passes through the meter, the needle will indicate a value. However, the galvanometer cannot directly handle large currents, so it is necessary to connect some resistors in parallel or series with the galvanometer … Read more
This is a new model of the Nanjing Kehua MF47-F multimeter. Upon opening the back cover, it is easy to notice that compared to the old model, the most obvious difference is that the function switch section has adopted a rotating buckle design. After a thorough examination, I recently made a few modifications to achieve … Read more
Electrical Engineering Learning Network: www.dgdqw.com Follow the official WeChat account of the Electrical Engineering Learning Network “Electrical Engineering and Electronics” to gain more experience and knowledge. The multimeter is the primary troubleshooting tool for electricians. Once accustomed to it, even when a fault occurs that could be diagnosed without a multimeter, one may feel uneasy … Read more
1. Usage of Multimeters 1. Understanding Common Symbols on Multimeters Types of electrical measurements and switch positions: ACV (or V) — AC voltage range, typically includes 2.5V, 10V, 50V, 250V, 500V, etc. DCV (or V) — DC voltage range, typically includes 0.5V, 2.5V, 10V, 50V, 250V, 500V, etc. DCmA (or mA) — DC milliamp range, … Read more
First, it is essential to develop good habits by carefully checking the multimeter for any abnormalities before use. This does not take much time but has a significant impact. For example, check for any damage to the meter, and whether the digits or needle are functioning correctly, especially when measuring high voltages. Always inspect the … Read more
What is a multimeter? A multimeter, also known as a multi-tester, volt/ohm meter, is a versatile measuring instrument that can be classified into analog and digital types. It is a multifunctional, multi-range measuring device that can generally measure DC current, DC voltage, AC current, AC voltage, resistance, and audio levels. Some models can also measure … Read more